This was posted by today on Slog (thank you, Eli Sanders), and since I’ve been meaning to write up a post almost exactly like this but just haven’t gotten it done, I figured I might as we’ll reference what has already been said well enough there:

Since 2006, Washington’s Republican Secretary of State has canceled more than 450,000 voter registrations in an effort to “clean up” the voter rolls. Sure, many are duplicate registrations or persons who moved out of state. But many are persons who think they’re properly registered and intend to vote in November. I personally know people this has happened to!

It doesn’t take much to get removed from the voter rolls. You may have been removed if, for example:

(1) you haven’t voted in a long time,(2) your signature on your absentee ballot envelope wasn’t deemed a match with the signature on your registration card, or(3) your absentee ballot was returned by the post office (the post office doesn’t forward ballots to your new address).

Everyone should check to make sure you are currently registered at your current address. You can do this online, and in most cases you can update your registration online. But you must make any changes by October 4!